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stew22 View Drop Down
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Posts: 5 		Post Options Post Options   Quote stew22 Quote  Post ReplyReply Direct Link To This Post Topic: Not sure what they are
    Posted: 30 Jan 2010 at 11:57am
Three items collected along the east yorkshire coast (fraisthorpe & spurn point), which I could not identify. The first picture is a grey shale with a raised pimple texture. The second picture it is the brown straight lines which are deposited through the sample which interested me, they seem to be thin hollow tube structures. The last one with hexagonal structure could this be crocodile scute?
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Naze Dave View Drop Down
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Posts: 3733 		Post Options Post Options   Quote Naze Dave Quote  Post ReplyReply Direct Link To This Post Posted: 30 Jan 2010 at 8:34pm
I think the first 2 are mineral formations of some sort, the first pic looks like 'bubbly' pyrite, not sure on 2nd. The last item could be fossil coral but im not sure.
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Dave
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What's wrong with white winklepickers...?
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Tabfish View Drop Down
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Posts: 805 		Post Options Post Options   Quote Tabfish Quote  Post ReplyReply Direct Link To This Post Posted: 01 Feb 2010 at 9:20pm
Hello Stew22
The first picture looks to me to be very fine grained lower jurassic - lower lias material, from the picture I am looking at I think I can see 'wood' with septarian lines going across it.
 
The second picture looks like it has crinoid remains (the shiny bits) inside.
 
And the third picture is I think volcanic unfortunately.
 
Please have a look at the picture below containing a similar peice to yours with a bit of coral top left and croc and turtle scuts on the right from Hampstead on the IOW.
 
Another picture with the main peice turned over.
I picked up the biggest peice thinking it was coral but was dissapointed although it is now in my collection because of the different preservation on each side.
 
Tabfish
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Posts: 805 		Post Options Post Options   Quote Tabfish Quote  Post ReplyReply Direct Link To This Post Posted: 02 Feb 2010 at 7:09pm
Just had another look stew and I recon Dave could be right with the last peice being coral, what's on the side and underneth of the rock, is their any structures inside of the hexagonals?
 
Tabfish


Edited by Tabfish - 05 Feb 2010 at 9:41pm
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stew22 View Drop Down
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Posts: 5 		Post Options Post Options   Quote stew22 Quote  Post ReplyReply Direct Link To This Post Posted: 03 Feb 2010 at 8:50pm
Yes i think the last piece is coral, i had a closer look and the radiating filaments are visible in one corner.  
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Tabfish View Drop Down
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Posts: 805 		Post Options Post Options   Quote Tabfish Quote  Post ReplyReply Direct Link To This Post Posted: 03 Feb 2010 at 8:58pm
Well done Stew - I can see them.
Keep looking as well for the croc bit's although they are 'ultra' rare in this area of the Yorkshire coast.
 
Tabfish
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Posts: 805 		Post Options Post Options   Quote Tabfish Quote  Post ReplyReply Direct Link To This Post Posted: 05 Feb 2010 at 9:14pm
Stew
Variable preseration is were the same fossil in not preserve in the same way as the last one, if you know what I meen.
So please have a look at the corals that I have found in the same area as the one that you found, but don't go trying to polish yours!
Sand paper and a polishing mop turned this erratic into something spectacular.
 
A closer picture.
 
Another one.
 
A rough beach coral before shaping and polishing.
 
The other side.
 
And finally one (i have several) of the most treasured fossils in our collection, it is a coral and was found by my eldest son Jonathan, (it is not the biggest fossil we have found) - that goe's to two of my other son's Jon and Sam on the IW but this fossil I hope fit's the topic.
 
We were on holiday at Reighton Sands when Jonathan was about 7 years old and we were taking a walk on the beach - when I said to him turn that stone over, he did and this was on the other side.
 
All the best.
 
Tabfish
 
 
 
 
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prep01 View Drop Down
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Posts: 488 		Post Options Post Options   Quote prep01 Quote  Post ReplyReply Direct Link To This Post Posted: 05 Feb 2010 at 9:31pm
Nice lapidary there Harry!
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Tabfish View Drop Down
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Posts: 805 		Post Options Post Options   Quote Tabfish Quote  Post ReplyReply Direct Link To This Post Posted: 05 Feb 2010 at 9:35pm
Thanks prep01
 
Tabfish
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stew22 View Drop Down
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Post Options Post Options   Quote stew22 Quote  Post ReplyReply Direct Link To This Post Posted: 10 Feb 2010 at 10:31pm
thanks for the pictures of the polished coral. I have plenty of coral boulders i could have a go at polishing, what equipment did you use? I have a rubber pad sanding attachment for my electric drill, would coarse grit papers be enough to get a smooth surface?
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Tabfish View Drop Down
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Posts: 805 		Post Options Post Options   Quote Tabfish Quote  Post ReplyReply Direct Link To This Post Posted: 15 Feb 2010 at 9:56pm
Hello Stew
If the coral is a good shape I would start with a 60 grit then move on to finer grits, I usualy polish nodules by hand under the tap using wet and dry - going from 60 to 200 and so on untill I use a 1200grit paper, when I have finished that process I then put it on a bench polishing machine.
A good shape to start with saves you trying to polish nooks and crannies in the rock.
Mechanical polishing only speeds up the process, and for what I use it for could almost be done by hand.
Sorry I have not replyed sooner but I must have overlooked this one.
 
Tabfish
 
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J.Simper View Drop Down
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Posts: 40 		Post Options Post Options   Quote J.Simper Quote  Post ReplyReply Direct Link To This Post Posted: 16 Feb 2010 at 10:03am
Fantastic job on that polished coral, it looks great!
Mud glorious mud.
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Tabfish View Drop Down
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Posts: 805 		Post Options Post Options   Quote Tabfish Quote  Post ReplyReply Direct Link To This Post Posted: 16 Feb 2010 at 10:04pm

Thank's J.Simper

It turned out better than expected - to say the least!
 
Tabfish
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